Sanding machine



Aug. 18, 1931. G, P, BA|| EY 1,819,012

sANDINc- MACHINE Filed April 17, 1929 W V772. MW

Cll'loz new Patented Aug. 18, 1931 UNITED STATES GERWIN P. BAILEY, OF SALT LAKE CITY, UTAH SANDING MACHINE Application led April 17,

My invention relates to the surfacing of floors and has for its object to provide a new and efficient machinefor sanding the ends of the boards where the usual type machine cannot reach.

A further object is to provide a sanding machine for sanding the boards at the ends, which will be adjustable and which may be used near the edges of a room where the flooring abuts with the baseboard.

A still further object is to provide a sanding machine which will be easily handled and one in which the motor may be removed and used in the regular Hoor sander if desired.

A still further object is to provide a machine which may be used on floors in small closets and hallways.

These objects I accomplish with the device illustrated in the accompanying drawings in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claims.

In the drawings in which I have shown the best and most preferred manner of building my invention Figure 1 is a side elevation of the machine. Figure 2 is a section on line 2 2 of Figure 3. Figure 3 is a plan view of the machine with the motor removed. Figure 4 is an end view of the machine.

In the drawings I have shown the main body or framework of the machine as A, the motor as B, and the chain drive from the motor as C, and the cross shaft as D. The main cross shaft D is passed through the machine framework near the front end thereof and the motor B is mounted on the top O side of said framework. On the rear end of said framework I mount a swivel type roller E to support the rear end of the device. On the sides and near the front end of said framework I mount two rollers 1 and 2. The

f5 said rollers are mounted each in bearing blocks 3 and 4 and the blocks are made with the body thereof secured on the sides of the framework. Holes are bored from edge to edge of the said blocks and a shaft 5 is carried in each hole. The end of the said shaft 1929. serial No. 355`6s3.

is flattened and perforated to receive a stub shaft 6. The said stub shaft 6 is secured to the shaft 5 by a nut 7 on the lower side thereof and a nut 8 on the top side thereof. Bumper rollers 9 are then placed on said shaft 55 and another nut 10 holds the rollers on said shaft, and the nut 8 and thenut 10, may be moved longitudinally alongthe shaft to move the roller upward or downward as the adjustment thereof, to make the bumper rollers fit against the baseboard of the room at the desired position. For baseboards which are very narrow the shaft- 5 may be turned upside down placing the shaft 6 on the lower side thereof and the rollers 9 will be below the shaft 5 placing them nearer tothe floor surface. Across the framework A from side to side thereof and mounted in suitable bearings I place the cross shaft D. On one end of the said shaft I place a clutch F and to the clutch I mount a gear sprocket wheel 10. rIhe chain C driven from the motor sprocket 11 engages over the wheel 10 and rotates the shaft D. On the other end Vof the shaft D, I mount a small sprocket pinion 12 and under the motor and mounted transversely across i' the Vframework A, I mount acrank shaft 15. rThe end of the crank shaft 15 which protrudes'through the framework on the side of the framework opposite to the motor so pinion is then provided with a sprocket gear 14 which gear is connected with` the shaft by a chain drive 13 on the pinion 12. The crank shaft 15 is mounted in suitable bearing in the framework A and is of the two .85 bearing type having two connecting rods 16 and 17 attached thereto. Acrossvthe framework A and in front of the crank shaft I thenprovide a pivotedguide bar 18 which guide bar 18 is provided with two spaced ,Q0 apart guide bars 19 and 20. The free end of the said guide bars 19 and 20 are secured in a pressure foot 21. I then provide two polishing feet k22 and 23, said feet having the top end thereof bifurcated at 24 and a wrist pin 9s- 25 connects each foot with one of the con- 4 necting rods 16 and 17. the foot 22 being connected with the rod 16 and the foot.k 2.3 with the rod 17. Holes are then bored through the body 24 of the feet 22 and 23 and .m0

the rods or guide bars 19 and 20 are passed therethrough. rIhus when the pressure foot 21 is lowered the bars 19 and 20 are lowered on their outer free end which action presses the feet 22 and 23 downwardly onto the floor. The bottom side of the feet is extended forward into a polishing base 25. On the bottom side of the base 25 I secure felt pads 26 and around and under the bottom of the pads I place sandpaper 26a. Along each side of the base 25 I provide a groove in which groove a clamp member is secured and when the sandpaper 26a has been placed under the felt pads the edges thereof are bent upwardly along the sides of the base 25 and a clamp is then placed thereover and tightened to hold the paper in place. The clamp member is made of a U-shaped piece of strap iron having a roller 23 mounted through the end of the legs thereof; with one end of the roller 28 extended and made hexagonal on which a wrench may be placed to rotate the roller. The said roller is mounted through the clamp eccentrically so that when the roller is rotated it is moved inwardly tightening against the sandpaper.

On the top back side of the framework I mounta bracket handle 30 on which a control switch 31 is mounted to control the motor and wires connect the motor with the switch. On the front end of the framework I mount a similar bracket handle 31 and through the top cross piece 32 I place two spaced apart rods 33. The bottom ends of the rods 33 are secured in the pressure foot 21. On the top ends of the rods and above the cross piece 32 I place two springs 34 and 35 to normally hold the pressure foot raised and this holds the feet 22 and 23 away from the floor when the device is not in use. A. handle 36 is placed across the top ends of the bars and secured thereto with the springs between the cross-piece 32 and the handle 36.

The operation of my device is as follows:

The motor B is started which drives the chain C and rotates the shaft D. rIhis drives the chain 13 and the gear 14 which rotates the crank shaft 15. This actuates the connecting rods 16 and 17 moving the feet 22 and 23 forward and back as the crank shaft rotates. To sand the floor the operator then presses down on the handles 36 pressing the feet 22 and 23 against the floor and the sandpaper on the base 25 then sands the floor surace.

Having thus described my invention I desire to secure by Letters Patentand claim:

1. In a device of the class described, the combination of a framework having upright handles on each end thereof; a crank shaft mounted in suit-able bearings in said framework; means to rotate said crank shaft; a guide bar mounted across said framework and having two spaced apart bars extending forward at right angles thereto; a pressure foot having the free ends of the spaced apart bars mounted therein; means to control said pressure foot on the top of one of said handles; springs to raise said foot when not in use; connecting rods carried on said crank shaft; sanding feet secured on the end of said connecting rods and having the two guide bars passing longitudinally through thevupper portion thereof; and means to secure sand paper on the bottom surface of said pressure feet.

2. In a device of the class described, the combination of framework having upright handles on each end thereof; a. crank shaft mounted in suitable bearings in said framework; means to rotate said crank shaft; a guide bar mounted across said framework and having two spaced apart bars extending forward at rightangles thereto; a pressure foot having the free ends of the spaced apart bars mounted therein; means to control said pressure foot on the top of one of said handles; springs to raise said foot when not in use; connecting rods carried on said crank shaft; sanding feet secured on the end of said connecting rods and having the two guide bars passing longitudinally through the upper portion thereof; rollers on which said framewor; is mounted; and bumper rollers mounted adjustably on each side of said machine adapted to be moved forward or backward as necessary; said rollers to engage against the side wall of the room being sanded and to space the machine therefrom.

3. In a device of the class described the combination of a framework; a crank shaft mounted thereacross; connecting rods operated by said crank shaft; sanding feet secured on the ends of said connecting rods; means to secure sandpaper to said feet; horizontal shafts passing through said feet having one end pivoted and the other end secured to a manual control handle with springs to hold said feet from the floor until manually operated; means to actuate said crank shaft; and rollers on which said device may be operated laterally.

In testimony whereof he has afhxed his signature.

GERVVIN P. BAILEY. 

